Hello Mahmood, you said the general query from Andy "works" and now you say that there was no output. If this query doesn't return anything, your triple store is empty.
, Lorenz > There was no output at all through the general query. > > Now I am working with an OWL file and get all the concepts (It has only one > concept). The query I am running is: > > prefix owl: <http://www.w3.org/2002/07/owl#> > prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> > > SELECT DISTINCT ?class ?label ?description > WHERE { > ?class a owl:Class. > OPTIONAL { ?class rdfs:label ?label} > OPTIONAL { ?class rdfs:comment ?description} > } > LIMIT 25 > > The OWL file is uploaded successfully but there is no result of the query. > > Any thoughts, I'll appreciate. > > Regards > > -----Original Message----- > From: Andy Seaborne [mailto:[email protected]] > Sent: 19 October 2016 15:55 > To: [email protected] > Subject: Re: Fuseki 2.4.0 web user interface > > > > On 19/10/16 15:44, Mahmood Ahmad wrote: >> Ah, your query works! >> >> I had just missed a '}' character in the end. >> >> Thanks Andy, but why did my query not work. It was: >> >> SELECT ?subject ?predicate ?object >> WHERE { >> ?subject ?predicate ?object >> } >> LIMIT 25 > Please note that I can't see your screen so I can't see what the output to > the general query was. > > But I guess it has the G column set. Named graph not default graph. > > >> Regards >> >> -----Original Message----- >> From: Andy Seaborne [mailto:[email protected]] >> Sent: 19 October 2016 15:25 >> To: [email protected] >> Subject: Re: Fuseki 2.4.0 web user interface >> >> The list does not pass attachments through. >> >> How are you runnign the server exactly? >> >> >> Ask this query: >> >> SELECT * { { ?s ?p ?o } UNION { GRAPH ?g {?s ?p ?o } } } >> >> and don't forget to press the "query" button (it caches results otherwise). >> >> Andy >> >> >> >> On 19/10/16 14:23, Mahmood Ahmad wrote: >>> Andy, >>> >>> I used a simple ulo.ttl file (owl file converted to ttl format) to >>> upload on dataset /ds (Fuseki 2.4.0) and ran a simple query to get >>> all triples. The file uploaded correctly but generated no result in >>> query results portion of the Fuseki v2.4.0 web UI, although there are >>> 11 triples in ulo.ttl >>> >>> The ttl file is attached. There was no result from the execution of query, >>> nor a message of success/failure. >>> >>> Please can you suggest something so that I could get some output from the >>> query? >>> >>> Regards >>> Mahmood >>> >>> >>> >>> -----Original Message----- >>> From: Andy Seaborne [mailto:[email protected]] >>> Sent: 19 October 2016 13:57 >>> To: [email protected] >>> Subject: Re: Fuseki 2.4.0 web user interface >>> >>> Note what it says at the top of the page: >>> >>> """ >>> This page covers Fuseki v1. As of Jena 2.13.0, there is also a new >>> version, Fuseki v2. See Fuseki2 documentation. Both Fuseki v1 and >>> Fuseki >>> v2 are currently active and maintained. >>> """ >>> >>> You are looking at Fuseki1 documentation. >>> >>> Andy >>> >>> On 19/10/16 13:54, Andy Seaborne wrote: >>>> It is looking for a file called tdb.ttl which is not found. >>>> >>>> --desc is for a assembler file - you have to provide that, the >>>> documentation is out of date. >>>> >>>> If all you eant is some small data for experimentation: >>>> >>>> fuseki-server --file <YourData.ttl> /ds >>>> >>>> will work >>>> >>>> If you have a TDB database, >>>> >>>> fuseki-server --loc <YourDB> /ds >>>> >>>> Andy >>>> >>>> On 19/10/16 12:39, Mahmood Ahmad wrote: >>>>> Hi, >>>>> >>>>> [I am using Apache Jena Fuseki 2.4.0 on a Windows 10 machine] >>>>> >>>>> Can anyone please point me to the tdb.ttl for running a few >>>>> practice SPARQL queries? The Apache Jena says that TDB is a part of >>>>> Apache Jena >>>>> 3.1.0 on the following page: >>>>> >>>>> http://jena.apache.org/documentation/tdb/index.html >>>>> >>>>> I have installed Fuseki 2.4.0 and I am looking to run the Fuseki >>>>> Server with tdb.ttl using the command: >>>>> fuseki-server --desc tdb.ttl /ds >>>>> >>>>> as given on the page: >>>>> https://jena.apache.org/documentation/serving_data/ >>>>> >>>>> The error I get is as follows: >>>>> >>>>> C:\Users\mahmo_myz922s\apache-jena-fuseki-2.4.0\apache-jena-fuseki-2. >>>>> 4.0>fuseki-server >>>>> --desc tdb.ttl /ds >>>>> [2016-10-19 12:14:49] Server INFO Dataset from assembler >>>>> org.apache.jena.sparql.ARQException: Failed reading assembler >>>>> description: Not found: tdb.ttl >>>>> at >>>>> org.apache.jena.sparql.core.assembler.AssemblerUtils.readAssemblerF >>>>> i >>>>> l >>>>> e(AssemblerUtils.java:91) >>>>> >>>>> at >>>>> org.apache.jena.sparql.core.assembler.AssemblerUtils.build(Assemble >>>>> r >>>>> U >>>>> tils.java:104) >>>>> >>>>> at arq.cmdline.ModAssembler.create(ModAssembler.java:72) >>>>> at >>>>> arq.cmdline.ModDatasetAssembler.createDataset(ModDatasetAssembler.j >>>>> a >>>>> v >>>>> a:43) >>>>> >>>>> at >>>>> org.apache.jena.fuseki.cmd.FusekiCmd$FusekiCmdInner.processModulesA >>>>> n >>>>> d >>>>> Args(FusekiCmd.java:284) >>>>> >>>>> at jena.cmd.CmdArgModule.process(CmdArgModule.java:52) >>>>> at jena.cmd.CmdMain.mainMethod(CmdMain.java:92) >>>>> at jena.cmd.CmdMain.mainRun(CmdMain.java:58) >>>>> at jena.cmd.CmdMain.mainRun(CmdMain.java:45) >>>>> at >>>>> org.apache.jena.fuseki.cmd.FusekiCmd$FusekiCmdInner.innerMain(Fusek >>>>> i >>>>> C >>>>> md.java:102) >>>>> >>>>> at >>>>> org.apache.jena.fuseki.cmd.FusekiCmd.main(FusekiCmd.java:67) >>>>> >>>>> Any ideas, I'll appreciate. >>>>> >>>>> Regards >>>>> Mahmood >>>>> >>>>> Mahmood Ahmad, PhD >>>>> (Semantic Information Architect) >>>>> -- Lorenz Bühmann AKSW group, University of Leipzig Group: http://aksw.org - semantic web research center
